The View Composer upgrade process has specific requirements and limitations.

To run the View Composer installer, you must be a domain user with Administrator privileges on the system.

Security-Related Requirements

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View Composer requires an SSL certificate that is signed by a CA (certificate authority). If you intend to replace an existing certificate or the default, self-signed certificate with a new certificate after you install View Composer, you must import the new certificate and run the SviConfig ReplaceCertificate utility to bind your new certificate to the port used by View Composer.

If you install vCenter Server and View Composer on the same Windows Server computer, they can use the same SSL certificate, but you must configure the certificate separately for each component.

Verify that no applications that run on the View Composer computer use Windows SSL libraries that require SSL version 2 (SSLv2) provided through the Microsoft Secure Channel (Schannel) security package. The View Composer installer disables SSLv2 on the Microsoft Schannel. Applications such as Tomcat, which uses Java SSL, or Apache, which uses OpenSSL, are not affected by this constraint.

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To enhance the security of View Composer, disable the weak cryptographic cipher suites on the Windows Server computer on which the View Composer service is installed. See "Disable Weak Cryptographic Cipher Suites on the View Composer Server" in the VMware Horizon View Installation guide.